Process for protecting roller bearings against corrosion

Abstract

A process for protecting the surface of a roller bearing against corrosion. The roller bearing is provided with a thin protective coating of a powdered coating material or of a wet coating material and then the bearing is inductively heated, at the coated surface thereof, in the range of 200° C. to 300° C. for a few seconds to cure the coating material. The bearing is thereafter cooled. The wet coating material is based on inorganic substances and is electrically conductive.

What is claimed is: 
     
       1. A process for protecting a roller bearing against corrosion, the process comprising: providing a heat curable, thin protective coating of either a powder coating material or a wet coating material on at east a portion of the bearing, the bearing having been machine finished and being provided with at least one of grease, seals, and installation in a surrounding part, and   then inductively heating at least the area of the coated portion of the bearing for curing the coating material.   
     
     
       2. The process of claim 1, wherein the inductive heating and the resultant curing are performed generally at the surface of the bearing or part. 
     
     
       3. The process of claim 2, wherein the coated surfaces of the bearing are inductively heated to be at a temperature in the range of from 200° C. to 300° C. 
     
     
       4. The process of claim 2, wherein the inductive heating is conducted for a few seconds and the surfaces of the bearing are held at the inductive heating temperature. 
     
     
       5. The process of claim 1, wherein the coating is applied to have a final coated thickness in the range of about 5-30 μm. 
     
     
       6. The process of claim 5, wherein the protective coating is of an inorganic material having a cathodic action. 
     
     
       7. The process of claim 6, wherein the coated surfaces of the bearing are inductively heated to be at a temperature in the range of from 200° C. to 300° C. 
     
     
       8. The process of claim 1, wherein the protective coating is of an inorganic material having a cathodic action. 
     
     
       9. The process of claim 1, wherein the protective coating is a wet coating material based on inorganic substances and is electrically conductive. 
     
     
       10. The process of claim 1, wherein the inductive heating is conducted for a few seconds. 
     
     
       11. The process of claim 10, wherein the bearing is cooled after the protective coating has been applied. 
     
     
       12. The process of claim 1, wherein the bearing is cooled after the protective coating has been applied.